drivers/qe/uec.c: Fix GCC 4.6 build warning

uec.c: In function 'uec_stop':
uec.c:267:22: warning: variable 'uccf' set but not used [-Wunused-but-set-variable]
uec.c: In function 'uec_set_mac_if_mode':
uec.c:328:15: warning: variable 'uec_info' set but not used [-Wunused-but-set-variable]
uec.c: In function 'adjust_link':
uec.c:519:11: warning: variable 'uec_regs' set but not used [-Wunused-but-set-variable]

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>